Ashes 2063 - Doom 2 Mod

Black Reliquary - Total conversion mod for Darkest Dungeon

Brutal Doom - Doom Mod

Castlevania Simon's Destiny - a total conversion Doom mod

Caveman 2 Cosmos - Civilization 4 total overhaul mod

Celeste Strawberry Jam mod

Chrono Trigger Pixel Demaster Mod

Contra - C&C: Generals Zero Hour Mod

  Crusader Kings 2 A Song of Ice & Fire Mod

Dark Souls 3 Seamless Co-op Mod

Dark Souls Remastered Seamless Co-op Mod

DBZ Budokai 4 - Dragonball Z Infinite World (PS2) Mod

Deus Ex: Nihilum

DMC3 Crimson - Devil May Cry 3 HD Collection Mod

  Dhwem3 - Doom 3 Mod  

  Doom Infinite - Doom 2 Mod

Elden Ring Nightreign Seamless Two Player Co-op Mod 

Elden Ring Seamless Co-op Mod

Elden Ring: The Convergence - Overhaul Mod

Enderal (free total conversion Mod for Skyrim) 

 Entropy Zero 2 (free Half Life 2 mod)  

Fallout 4 London Mod guide  

Final Fantasy 7 7th Heaven Mod   

 Final Fantasy 7 Satsuki Yatoshi SYW Mod  

 Final Fantasy 9 Moguri Mod 

Final Fantasy Tactics The Lion War of the Lions Mod  

Forgotten Hope 2 - Battlefield 2 Mod

GoldenEye: Source - Half-Life 2 Mod 

GZDoom with GZDeck Mods 

Horn of the Abyss - Heroes of Might and Magic III Mod

 Icewind Dale 2 Enhanced Edition - Icewind Dale 2 Mod 

 Louie' Mansion Pikmin Overhaul mod for Luigi's Mansion  

Mario Kart 8 Deluxe - CTGP Deluxe mod

Marvel vs Capcom Infinite & Beyond Mod  

Medieval 2: Total War Kingdoms Mod: Third Age Total War

Mental Omega - Command & Conquer Red Alert 2 Mod

Morrowind Rebirth - Elder Scrolls III: Morrowind Mod 

 NBA Jam Legends on Fire Edition   (conversion mod of NBA JAM On Fire Edition (OFE) for PlayStation 3 - installation instructions for RPCS3 in link)

 No More Room in Hell - Half-Life 2 Mod

Persona 3 FES HD Overhaul Mod & Widescreen Patch

 Pillars of Eternity 2 Deadfire - Font Increase Mod 

 PMEX Remix - Super Smash Brothers Brawl Mod

Portal Stories Mel   (free Portal 2 mod)

Portal Reloaded - Portal 2 Mod

  Portal Revolution - Portal 2 Mod

Project Brutality - Doom 2 Mod

  Rainbow 6 Black Ops

NB, once installed, add the file R6BOLegacy.exe as your non-steam game. Also, go to the installation folder>data>video and delete the two opening videos, BOintro.mpg and splash.mpg.

 Rbdoom3BFG - Doom 3 BFG Edition  Mod

Republic at War - Star Wars: Empire at War: Forces of Corruption Mod

Sekiro Resurrection - overhaul mod

Skyrim Tuxborn overhaul mod

Slay the Spire: Downfall

Sphinx and the Cursed Mummy - PC Mod

S.T.A.L.K.E.R.: Shadow of Chernobyl Mod Radiophobia 3

Star Wars Battlefront 2 Remaster Mod

 Star Wars Movie Duels - Total conversion mod for Jedi Knight - Jedi Academy

Super Mario Eclipse - Super Mario Sunshine Mod

 Super Mario Expedition 2 a Super Mario 3D Land mod

Super Mario Odyssey Online mod

  Super Mario Sunburn - Sunshine Mod

 Super Smash Bros. Melee - Akaneia Build

Video

Terraria Calamity Mod

Terraria - tModLoader

The Binding of Isaac - External Items Description mod

 The Chronicles Of Myrtana Archolos - Mod For Gothic 2 Gold Edition

The Citizen - Half Life 2 Mod

  The Dark Mod - Tribute to The Thief Series

The Old Realms - Mount & Blade 2: Bannerlord Mod

The Witcher 3 - Brothers in Arms Mod

Misery: S.T.A.L.K.E.R. Call of Pripyat Conversion Mod

 THUGPro - Mod - Must Have THUG2 and also this COMMENT for more detail

 Ultima V Lazarus - a Dungeon Siege mod

Undertale Together - Undertale Mod

Warcraft 1 Mod

 Warcraft 2 Mod

Watch Dogs Living City mod

Wolfenstein: Blade of Agony

XWVM - Star Wars X-Wing Special Edition Mod